CN103852261A - Method for testing transmission efficiency of automobile transmission system - Google Patents
Method for testing transmission efficiency of automobile transmission system Download PDFInfo
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- CN103852261A CN103852261A CN201210522130.2A CN201210522130A CN103852261A CN 103852261 A CN103852261 A CN 103852261A CN 201210522130 A CN201210522130 A CN 201210522130A CN 103852261 A CN103852261 A CN 103852261A
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Abstract
The invention relates to the field of measurement, in particular to a method for testing transmission efficiency of an automobile transmission system. The method includes the following steps that A, components of the transmission system are installed on a test stand through an installation clamp, and a torsion and rotation speed sensor, a first torque sensor, a second torque sensor, a third torque sensor and a fourth torque sensor are installed in the transmission system; B, a gear shift control mechanism is shifted to a certain gear; C, a data collection and control system sends an instruction to a variable frequency motor to output torsion; D, the data collection and control system obtains torsion data and torque data from the sensors; E, the transmission efficiency of the transmission system is calculated according to a formula. By the method, the detailed transmission efficiency data of the whole transmission system and links of the transmission system under the installation state of a real automobile and under the different included angles between the axis of a transmission and the axis of a transmission shaft or between the axis of a main speed reducer and the axis of the transmission shaft can be obtained, and references are provided for design improvement. The structure is simple and stable, maintenance is easy, and the method is suitable for all front-engine rear-drive automobile types.
Description
Technical field
The present invention relates to fields of measurement, relate in particular to a kind of car transmissions transmission efficiency method of testing.
Background technology
Car transmissions are the actuating units between motor car engine and driving wheel, and it is that the power that engine is exported passes to driving wheel that its basic training is used.Car transmissions mainly comprise the parts such as clutch coupling, variator, main reducing gear, differential mechanism and semiaxis, this system need to engine collaborative work, to guarantee automobile normally travel necessary driving force and the speed of a motor vehicle under various driving conditions, and make automobile there is good power performance and the economy performance.The height of car transmissions transmission efficiency can reflect the combination property of car transmissions, comprises its design level and manufacture level etc., but also can reflect the size of the power loss of car transmissions inside.Reduce oil consumption, reducing discharge is the theme of current Automobile Design.These can improve present situation by reducing the method such as automobile running resistance, lifting engine performance, but the transmission efficiency of raising kinematic train is also effective measures.
Summary of the invention
The technical matters that the present invention solves is: build a kind of car transmissions transmission efficiency method of testing, can measure easily the transmission efficiency of whole car transmissions, also can analyze the loss and the transmission efficiency thereof that draw kinematic train links, thereby provide improvement foundation for promoting the transmission efficiency of whole kinematic train.
The technical scheme that the present invention takes is for building a kind of car transmissions transmission efficiency method of testing, and the method comprises the following steps:
A, by sectional fixture, kinematic train all parts is arranged on testing table, and regulates sectional fixture, car transmissions all parts is adjusted to real vehicle installment state;
B, variable-frequency motor is connected with wheel box by torque rotary speed sensor, as the power source of car transmissions; Transmission shaft is connected with wheel box by the first torque sensor; Main reducing gear is connected with transmission shaft by the second torque sensor; The first drive axle is connected with the first load by the 3rd torque sensor; The second drive axle is connected with the second load by the 4th torque sensor;
C, shift control mechanism is pushed to a certain gear;
D, data collection and control system are sent instruction to variable-frequency motor, described variable-frequency motor output torque;
E, data collection and control system obtain variable-frequency motor torque data from described torque rotary speed sensor, obtain wheel box moment of torsion data from described the first torque sensor, obtain torque transmission shaft data from described the second torque sensor, obtain the first drive axle moment of torsion data from described the 3rd torque sensor, obtain the second drive axle moment of torsion data from described the 4th torque sensor;
F, according to the above-mentioned data of measuring, calculate the transmission efficiency of whole kinematic train and transmission efficiency and the power transmission loss thereof of kinematic train links according to formula.
As a further improvement on the present invention, described formula is, the transmission efficiency of whole system under certain gear:
η
system=(T10+T13)/(T3*K1*K2),
T10 is the moment of torsion data of the 3rd torque sensor, and T13 is the moment of torsion data of the 4th torque sensor 13, and K1 is the ratio of gear of variator under certain gear, the ratio of gear that K2 is main reducing gear;
The transmission efficiency of described wheel box:
η
wheel box=T6/ (K1*T3)
Wherein T6 is the moment of torsion data of the first torque sensor, and T3 is the moment of torsion data of torque rotary speed sensor 3;
The transmission efficiency of described transmission shaft:
η
transmission shaft=T8/T6
Wherein T6 is the moment of torsion data of the second torque sensor, and T8 is the moment of torsion data of the 3rd torque sensor;
The transmission efficiency of drive axle:
η
drive axle=(T10+T13)/(T8*K2).
As a further improvement on the present invention, described step B also has B1 step by step, adjusts the angle of the axis of described transmission shaft and the axis of described wheel box, and the method can be measured in the situation lower transmission system of this angle and the transmission efficiency of each parts thereof.
As a further improvement on the present invention, described step B also has B2 step by step: adjust the angle of the axis of described main reducing gear and the axis of described transmission shaft, the method can be measured in the situation lower transmission system of this angle and the transmission efficiency of each parts thereof.
As a further improvement on the present invention, described torque rotary speed sensor both sides are provided with shaft coupling.
As a further improvement on the present invention, described torque sensor both sides are provided with shaft coupling.
The invention has the beneficial effects as follows: can obtain whole kinematic train and the detailed transmission efficiency data of links under real vehicle installment state and variator axis angles different from drive shaft axis or main reducing gear axis angles different from drive shaft axis thereof by this device, for design improvement provides reference frame; Simple in structure and stable, be easy to safeguard; Can be used for all front-engine rear-drive vehicles.
Accompanying drawing explanation
Fig. 1 is the structural representation of kinematic train transmission efficiency test method of the present invention;
Fig. 2 is the process flow diagram of kinematic train transmission efficiency test method of the present invention.
Embodiment
Below in conjunction with accompanying drawing explanation and embodiment, the present invention is further described.
As shown in Figure 1, numeral in figure: 1, variable-frequency motor; 2, shaft coupling; 3, torque rotary speed sensor; 4, shift control mechanism; 5, wheel box; 6, the first torque sensor; 7, transmission shaft; 8, the second torque sensor; 9, the first drive axle; 10, the 3rd torque sensor; 11, the first load; 12, the second drive axle; 13, the 4th torque sensor; 14, the second load; 15, data collection and control system; 16, main reducing gear; 17, sectional fixture.
As shown in Figure 2, car transmissions transmission efficiency method of testing of the present invention comprises the following steps:
S01, by sectional fixture 17, kinematic train all parts is arranged on testing table, and regulates sectional fixture 17, car transmissions all parts is adjusted to real vehicle installment state;
S02, variable-frequency motor 1 is connected with wheel box 5 by torque rotary speed sensor 3, as the power source of car transmissions; Transmission shaft 7 is connected with wheel box 5 by the first torque sensor 6; Main reducing gear 16 is connected with transmission shaft 7 by the second torque sensor 8; The first drive axle 9 is connected with the first load 11 by the 3rd torque sensor 10; The second drive axle 12 is connected with the second load 14 by the 4th torque sensor 13;
S03, shift control mechanism is pushed to a certain gear;
S04, data collection and control system 15 are sent instruction to variable-frequency motor 1, and described variable-frequency motor 1 is exported torque;
S05, data collection and control system 15 obtain variable-frequency motor torque data from described torque rotary speed sensor 3, obtain wheel box moment of torsion data from described the first torque sensor 6, obtain torque transmission shaft data from described the second torque sensor 8, obtain the first drive axle moment of torsion data from described the 3rd torque sensor 10, obtain the second drive axle moment of torsion data from described the 4th torque sensor 12;
S06, according to the above-mentioned data of measuring, calculate the transmission efficiency of whole kinematic train and transmission efficiency and the power transmission loss thereof of kinematic train links according to formula.
As shown in Figure 1, in a dress kinematic train, variable-frequency motor 1 is connected with wheel box 5 by torque rotary speed sensor 3, as the power source of car transmissions, the first torque sensor 6 is connected with wheel box and transmission shaft 7 by shaft coupling 2, the second torque sensor 8 is connected with transmission shaft 7 and main reducing gear 16 by shaft coupling 2, main reducing gear 16 is fixed on drive axle 9, drive axle 9 two ends are connected with the 3rd torque sensor 10 and the 4th torque sensor 13 respectively by shaft coupling 2, are connected with the first load 11, the second load 14 simultaneously.
Described formula is;
The transmission efficiency of whole system under certain gear:
η
system=(T10+T13)/(T3*K1*K2),
T10 is the moment of torsion data of the 3rd torque sensor 10, and T13 is the moment of torsion data of the 4th torque sensor 13, and K1 is the ratio of gear of variator under certain gear, and K2 is the ratio of gear at main reducing gear;
The transmission efficiency of described wheel box 5:
η
wheel box=T6/ (K1*T3)
Wherein T6 is the moment of torsion data of the first torque sensor 6, and T3 is the moment of torsion data of torque rotary speed sensor 3;
The transmission efficiency of described transmission shaft 7:
η
transmission shaft=T8/T6
Wherein T6 is the moment of torsion data of the second torque sensor 8, and T8 is the moment of torsion data of the 3rd torque sensor 10;
The transmission efficiency of drive axle:
η
drive axle=(T10+T13)/(T8*K2);
As shown in Figure 1, described shaft rotation speed transducer both sides are provided with shaft coupling, and shaft coupling is that two axles (main drive shaft and driven shaft) for connecting in different institutions make it the mechanical component of common rotation with transmitting torque.
As shown in Figure 1, described torque sensor both sides are provided with shaft coupling, and the both sides of the first torque sensor 6, the second torque sensor 8, the 3rd torque sensor 10, the 4th torque sensor 13 are all provided with shaft coupling.
As shown in Figure 2, shift control mechanism 4 is allocated to a certain gear, data collection and control system 15 is sent instruction to variable-frequency motor 1, variable-frequency motor 1 is exported certain torque, measured by torque rotary speed sensor 3, the first torque sensor 6, the second torque sensor 8, the 3rd torque sensor 10, the 4th torque sensor 13 can be measured respectively wheel box 5, transmission shaft 7, half shaft output torque, can obtain its measurement data by data acquisition system (DAS) 15, and then can calculate in the transmission efficiency of this gear lower transmission system links and the transmission efficiency of whole system, by changing gear, can measure the transmission efficiency of different gear lower transmission systems and the transmission efficiency of links and power transmission loss, by adjusting the angle of transmission shaft 7 axis and wheel box 5 axis, the method can be measured in the situation lower transmission system of different angles and the transmission efficiency of each parts thereof, by adjusting the angle of main reducing gear 16 axis and transmission shaft 7 axis, the method can be measured in the situation lower transmission system of different angles and the transmission efficiency of each parts thereof, and then improve reference frame is provided for kinematic train.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. a car transmissions transmission efficiency method of testing, is characterized in that: the method comprises the following steps:
A, by sectional fixture, kinematic train all parts is arranged on testing table, and regulates sectional fixture, car transmissions all parts is adjusted to real vehicle installment state;
B, variable-frequency motor is connected with wheel box by torque rotary speed sensor, as the power source of car transmissions; Transmission shaft is connected with wheel box by the first torque sensor; Main reducing gear is connected with transmission shaft by the second torque sensor; The first drive axle is connected with the first load by the 3rd torque sensor; The second drive axle is connected with the second load by the 4th torque sensor;
C, shift control mechanism is pushed to a certain gear;
D, data collection and control system are sent instruction to variable-frequency motor, described variable-frequency motor output torque;
E, data collection and control system obtain variable-frequency motor torque data from described torque rotary speed sensor, obtain wheel box moment of torsion data from described the first torque sensor, obtain torque transmission shaft data from described the second torque sensor, obtain the first drive axle moment of torsion data from described the 3rd torque sensor, obtain the second drive axle moment of torsion data from described the 4th torque sensor;
F, according to the above-mentioned data of measuring, calculate the transmission efficiency of whole kinematic train and transmission efficiency and the power transmission loss thereof of kinematic train links according to formula.
2. car transmissions transmission efficiency method of testing according to claim 1, is characterized in that: described formula is, the transmission efficiency of whole system under certain gear:
η
system=(T10+T13)/(T3*K1*K2),
T10 is the moment of torsion data of the 3rd torque sensor, and T13 is the moment of torsion data of the 4th torque sensor 13, and K1 is the ratio of gear of variator under certain gear, the ratio of gear that K2 is main reducing gear;
The transmission efficiency of described wheel box:
η
wheel box=T6/ (K1*T3)
Wherein T6 is the moment of torsion data of the first torque sensor, and T3 is the moment of torsion data of torque rotary speed sensor 3;
The transmission efficiency of described transmission shaft:
η
transmission shaft=T8/T6
Wherein T6 is the moment of torsion data of the second torque sensor, and T8 is the moment of torsion data of the 3rd torque sensor;
The transmission efficiency of drive axle:
η
drive axle=(T10+T13)/(T8*K2).
3. the car transmissions transmission efficiency method of testing of stating according to claim 1, it is characterized in that: described step B also has B1 step by step, adjust the angle of the axis of described transmission shaft and the axis of described wheel box, the method can be measured in the situation lower transmission system of this angle and the transmission efficiency of each parts thereof.
4. the car transmissions transmission efficiency method of testing of stating according to claim 1, it is characterized in that: described step B also has B2 step by step: adjust the angle of the axis of described main reducing gear and the axis of described transmission shaft, the method can be measured in the situation lower transmission system of this angle and the transmission efficiency of each parts thereof.
5. car transmissions transmission efficiency method of testing according to claim 1, is characterized in that: described torque rotary speed sensor both sides are provided with shaft coupling.
6. car transmissions transmission efficiency method of testing according to claim 1, is characterized in that: described torque sensor both sides are provided with shaft coupling.
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| CN201210522130.2A CN103852261B (en) | 2012-12-07 | 2012-12-07 | Car transmissions transmission efficiency method of testing |
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| CN201210522130.2A CN103852261B (en) | 2012-12-07 | 2012-12-07 | Car transmissions transmission efficiency method of testing |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132809A (en) * | 2014-08-02 | 2014-11-05 | 山东交通学院 | Bench testing system for combined automatic automobile speed changer |
| CN104568430A (en) * | 2014-12-26 | 2015-04-29 | 吉林东光集团有限公司 | Measuring system for transmission mechanism |
| CN104634588A (en) * | 2015-03-11 | 2015-05-20 | 重庆理工大学 | Measurement method for support stiffness of drive axle |
| CN104713723A (en) * | 2015-03-23 | 2015-06-17 | 中国汽车工程研究院股份有限公司 | Endurance test failure judgment method for automobile transmission system |
| CN105890894A (en) * | 2016-04-07 | 2016-08-24 | 辽宁工业大学 | AMT transmission comprehensive performance evaluation method |
| CN107478427A (en) * | 2016-12-21 | 2017-12-15 | 宝沃汽车（中国）有限公司 | Car transmissions transmission efficiency method of testing |
| CN109470470A (en) * | 2018-11-09 | 2019-03-15 | 安徽江淮汽车集团股份有限公司 | One kind carrying out gearbox mechanical efficiency test macro and test method on vehicle |
| CN109946005A (en) * | 2017-12-20 | 2019-06-28 | 宝沃汽车（中国）有限公司 | The methods, devices and systems of power detection |
| CN112161736A (en) * | 2020-08-31 | 2021-01-01 | 上汽通用五菱汽车股份有限公司 | Application device of vehicle-mounted six-component force sensor |
| CN112622635A (en) * | 2020-12-24 | 2021-04-09 | 奇瑞汽车股份有限公司 | Method and device for distributing torque of double motors |
| CN112924186A (en) * | 2021-01-27 | 2021-06-08 | 东风汽车股份有限公司 | Method for testing dynamic property of automobile transmission system |
| CN112924064A (en) * | 2021-01-27 | 2021-06-08 | 东风汽车股份有限公司 | Method for testing transmission efficiency of automobile transmission system |
| CN113758619A (en) * | 2021-08-12 | 2021-12-07 | 东风汽车股份有限公司 | Pure electric vehicle transmission system testing device and transmission efficiency testing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303272A (en) * | 2008-04-29 | 2008-11-12 | 重庆大学 | Hybrid power automobile performance test simulation operation apparatus |
| JP2009190694A (en) * | 2008-02-18 | 2009-08-27 | Toyota Motor Corp | Drive unit of hybrid vehicle |
| CN201527343U (en) * | 2009-10-19 | 2010-07-14 | 重庆理工大学 | Performance test device for automobile steering system |
| CN101846585A (en) * | 2010-05-21 | 2010-09-29 | 重庆长安汽车股份有限公司 | Test method of automobile transmission system efficiency |
| JP2012152061A (en) * | 2011-01-20 | 2012-08-09 | Daihatsu Motor Co Ltd | Vehicle driving apparatus |
-
2012
- 2012-12-07 CN CN201210522130.2A patent/CN103852261B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009190694A (en) * | 2008-02-18 | 2009-08-27 | Toyota Motor Corp | Drive unit of hybrid vehicle |
| CN101303272A (en) * | 2008-04-29 | 2008-11-12 | 重庆大学 | Hybrid power automobile performance test simulation operation apparatus |
| CN201527343U (en) * | 2009-10-19 | 2010-07-14 | 重庆理工大学 | Performance test device for automobile steering system |
| CN101846585A (en) * | 2010-05-21 | 2010-09-29 | 重庆长安汽车股份有限公司 | Test method of automobile transmission system efficiency |
| JP2012152061A (en) * | 2011-01-20 | 2012-08-09 | Daihatsu Motor Co Ltd | Vehicle driving apparatus |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132809A (en) * | 2014-08-02 | 2014-11-05 | 山东交通学院 | Bench testing system for combined automatic automobile speed changer |
| CN104568430A (en) * | 2014-12-26 | 2015-04-29 | 吉林东光集团有限公司 | Measuring system for transmission mechanism |
| CN104634588A (en) * | 2015-03-11 | 2015-05-20 | 重庆理工大学 | Measurement method for support stiffness of drive axle |
| CN104634588B (en) * | 2015-03-11 | 2017-03-08 | 重庆理工大学 | A kind of drive axle support stiffness measuring method |
| CN104713723A (en) * | 2015-03-23 | 2015-06-17 | 中国汽车工程研究院股份有限公司 | Endurance test failure judgment method for automobile transmission system |
| CN105890894A (en) * | 2016-04-07 | 2016-08-24 | 辽宁工业大学 | AMT transmission comprehensive performance evaluation method |
| CN107478427A (en) * | 2016-12-21 | 2017-12-15 | 宝沃汽车（中国）有限公司 | Car transmissions transmission efficiency method of testing |
| CN107478427B (en) * | 2016-12-21 | 2019-09-20 | 宝沃汽车（中国）有限公司 | Car transmissions transmission efficiency test method |
| CN109946005A (en) * | 2017-12-20 | 2019-06-28 | 宝沃汽车（中国）有限公司 | The methods, devices and systems of power detection |
| CN109946005B (en) * | 2017-12-20 | 2021-02-26 | 宝沃汽车（中国）有限公司 | Method, device and system for power detection |
| CN109470470A (en) * | 2018-11-09 | 2019-03-15 | 安徽江淮汽车集团股份有限公司 | One kind carrying out gearbox mechanical efficiency test macro and test method on vehicle |
| CN112161736A (en) * | 2020-08-31 | 2021-01-01 | 上汽通用五菱汽车股份有限公司 | Application device of vehicle-mounted six-component force sensor |
| CN112622635A (en) * | 2020-12-24 | 2021-04-09 | 奇瑞汽车股份有限公司 | Method and device for distributing torque of double motors |
| CN112622635B (en) * | 2020-12-24 | 2022-07-08 | 奇瑞汽车股份有限公司 | Method and device for distributing torque of double motors |
| CN112924186A (en) * | 2021-01-27 | 2021-06-08 | 东风汽车股份有限公司 | Method for testing dynamic property of automobile transmission system |
| CN112924064A (en) * | 2021-01-27 | 2021-06-08 | 东风汽车股份有限公司 | Method for testing transmission efficiency of automobile transmission system |
| CN113758619A (en) * | 2021-08-12 | 2021-12-07 | 东风汽车股份有限公司 | Pure electric vehicle transmission system testing device and transmission efficiency testing method thereof |
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